1. Overlay Maps of Science (2010 update)
Ismael Rafols1,2, Alan Porter2 and Loet Leydesdorff3
1 SPRU, University of Sussex, Brighton
2 School of Public Policy, Georgia Institute Technology, Atlanta
3 Amsterdam School of Comm. Res. (ASCoR), Univ. Amsterdam
Rafols, I., Porter, A. L. and Leydesdorff, L. (2010) Overlay science maps: a new tool for research policy and library management. Journal of the American Society for Information Science and Technology. 61(9), 871–1887.  PDF. Interactive Maps. Overlay toolkit.

2. 4 Factors with Pajek Global Map of Science, 2010 update
224 Web of Science Categories
4 Factors with Pajek
Environmental S&T
Bio logy and Medicine
Physical Science
and Engineering
Psychology and Social Sciences
Method from Rafols, Porter and Leydesdorff (2009)

3. 6 Factors with Pajek Global Map of Science, 2010 update
224 Web of Science Categories
6 Factors with Pajek
Environmental S&T
Bio logy and Medicine
Physical S&T
Psychology and Social Issues
Computer Sci. and Engineering
Social Sciences
Method from Rafols, Porter and Leydesdorff (2009)

4. 19 Factors with Pajek Global Map of Science, 2010 update
224 Web of Science Categories
19 Factors with Pajek
Agri Sci
Ecol Sci
Geosciences
Infectious Diseases
Environ Sci & Tech
Clinical Med
Mech Eng
Chemistry
Materials Sci
Biomed Sci
Psychological Sci.
Physics
Health & Social Issues
Clinical Psychology
Computer Sci
Math Methods
Social Studies
Business & MGT
Econ Polit & Geography
Method from Rafols, Porter and Leydesdorff (2009)

5. Global Map of Science, 2010 update 224 Web of Science Categories
Insert Pajek Image on top
Agri Sci
Ecol Sci
Geosciences
Infectious Diseases
Environ Sci & Tech
Clinical Med
Mech Eng
Chemistry
Materials Sci
Biomed Sci
Psychological Sci.
Physics
Health & Social Issues
Clinical Psychology
Computer Sci
Math Methods
Social Studies
Business & MGT
Econ Polit & Geography
Method from Rafols, Porter and Leydesdorff (2009)

6. 4 Factors with VOSviewer
Global Map of Science, 2010 update
224 Web of Science Categories
4 Factors with VOSviewer
Bio logy and Medicine
Environmental S&T
Psychology and Social Sciences
Physical Sciences

7. 4 Factors with VOSviewer
Global Map of Science, 2010 update
224 Web of Science Categories
4 Factors with VOSviewer
Bio logy and Medicine
Environmental S&T
Psychology and Social Sciences
Physical Sciences

8. 6 Factors with VOSviewer
Global Map of Science, 2010 update
224 Web of Science Categories
6 Factors with VOSviewer
Bio logy and Medicine
Environmental S&T
Psychology and Social Issues
Social Sciences
Physical Sciences
Computer Sci & Engineering

9. 6 Factors with VOSviewer
Global Map of Science, 2010 update
224 Web of Science Categories
6 Factors with VOSviewer
Bio logy and Medicine
Psychology and Social Issues
Environmental S&T
Social Sciences
Physical Sciences
Computer Sci & Engineering

10. 19 Factors'
19 factors
6 Factors
6 factors
4 clusters
Agri Sci 17
Biology and Medicine 1
Biomed Sci
Computer Sci. and Engineering 6
Environmental S&T 4
Business & MGT 14 3
Physical Science and Engineering 2
Chemistry 16
Physical S&T
Psychology and Social Sciences
Clinical Med 5
Psychology and Social Issues
Psychological Sci 9
Social Sciences
Computer Sci
Ecol Sci
Econ Polit & Geography
Environ Sci & Tech 13
Geosciences 7
Health & Social Issues 10
Infectious Diseases 15
Materials Sci
Math Methods 19
Mech Eng 12
Physics 18
Clinical Psychology 8
Social Studies 11

11. Based on 2007 Global Science Map
Examples
Based on 2007 Global Science Map

12. 221 Web of Science Categories 18 Factors
Global Map of Science
221 Web of Science Categories
18 Factors
Rafols, Porter and Leydesdorff (2009)
Agri Sci
Ecol Sci
Geosciences
Infectious Diseases
Env Sci & Tech
Clinical Med
Chemistry
Matls Sci
Biomed Sci
Engineering
Psychological Sci.
Clinical Psychology
Health & Social Issues
Physics
Business & MGT
Computer Sci
Social Studies
Econ Polit. & Geography

13. U. Amsterdam
Georgia Tech
Period:
Details in paper
EMBL
LSE

14. Pfizer
Nestlé
Shell
Unilever

15. NIH
NSF
BBSRC
EPSRC

16. References Subject Category-based Science Maps
Leydesdorff, L. and Rafols, I. (2009) A Global Map of Science Based on the ISI Subject Categories. Journal of the American Society for Information Science and Technology, 60(2),
Rafols, I. and Leydesdorff, L. (2009). Content-based and Algorithmic Classifications of Journals: Perspectives on the Dynamics of Scientific Communication and Indexer Effects. Journal of the American Society for Information Science and Technology, 60(9),
Overlay
Rafols, I. and Meyer, M. (2010) Diversity and Network Coherence as indicators of interdisciplinarity: case studies in bionanoscience. Scientometrics, 82(2),
Rafols, I., Porter, A.L. and Leydesdorff, L. (2010) Science overlay maps: A new tool for research policy and library management. Journal of the American Society for Information Science and Technology 61(9), 871–1887.